Improvement in paper-cutting machines



l ,i i.

UNITED rkslikt-"Pisis ATENT OFFICE.

i Tl-IOMAS BROWN DOOLEY, OF BOSTON, MASSACHUSETTS ASSIGNOR OF jONE-HALFHIS RIGHT TO LORENZO M. DYE'R, OF SAME PLAGE.

IMPROVEMENT IN PAPER-CUTTING MACHINES.`

Specication forming part of Letters Patent No. 146,237, dated January 6,1874; application filed February 14, 1873.

To all whom @t may concern:

Be it known that I, THOMAS BROWN Doo- LEY, of Boston, in the county ofSuffolk and State of Massachusetts, have invented a new and ImprovedPower Paper-Cutter, of which the following is a specication, referencebeing had to the drawings annexed.

The nature of my invention is that of a Y machine with a frame, and witha raised platformen which bundles of paper may be laid, the frame havinga cutting-blade which lifts and lowers in a peculiar manner 5 also, incertain attachments of cog-wheels, shafts, &c., by which motion iscommunicated to the machine; and the object of the same is to cutsmoothly the edges of bundles of paper sheets.

Figure 1 is a view of the machine from the front. Fig. 2 is a side viewfrom the right hand in Fig. 1. Fig. 3 is a view from the top. Fig. 4 isa view in detail of one portion of my device, and is hereinafterexplained.

In the drawings, A AX, Fig. 1, A", Fig. 2,

are two upright slabs of metal, called the standards.77 These are cutaway to diminish their weight in any convenient manner. (See Fig. 2.) B,Fig. 1, is a slab of metal, passing from the standard A to the standardA horizontally, which secures the two standards to each other. Anothersimilar slab is similarly attached on the other side of the machine. O,Fig. 1, C C", Figs. 2-and 3, is a horizontal platform, passing from onestandard to the other, and firmly secured to the saine. D, Figs. 1, 2,and 3, is` the upper brace, being a slab of shape as seen in thefigures, which passes from and over the top of one standard to that ofthe other, and is firmly fastened to both. In Fig.A 2 is seen, at E, aperpendicular oblong slot in the upper part of the standard Af, thecenter of which slot is coincident, perpendicularly, with the center ofthe upper brace D. The other standard A, Fig. 1, has a similar slot.They arecalledtheblade-slots. Passing horizontally (see Fig. l) throughthese two slots isA a slab of metal, F, Figs. 1, 2, and 4, called theblade-bar.77 This blade-bar is supported' bytwo` arms, FX F", Fig. 1, inwhich igure their shape is seen. They are called the blade-bar' arms,77and hang and move loosely from two rivets orpins .attached to the upperbrace D. In the lower part of each ofJ them is an oblong slot, whoselongest dimension is in a perpendicular line. In these slots, rel.spectively, slide up and down two boxes or ends of them-their furtherends in Fig. 1-

penetrating and being attached to the bladebar F, which they thussupport. In Fig. 1 are seen, above and below, respectively, these boxesFZ F, two set-screws for each box, passing through the bodies,respectively, of the blade-bar arms. By unscrewing the upper setscrews,and screwing up the lower ones, or vice versa, these boxes are, atpleasure, raised or lowered, carrying with them the blade-bar F and theblade G. I sometimes, instead of this device, use a cross-bar withdiagonal slots, attached to the standards, in which slots the ends ofpins attached to the blade-bar move up and down.. The. blade-bar F,Figs. 1, 2, and 4, carries, iirmly secured to it at its lower edge, theblade G, which is a blade of steel, sharpened at thelower edge. Thisbladebar F is hollowed at the right-hand endgin Fig. 1 with an aperture,which is oblongin vertical section, (see Fig. 2,) and passesa'bouone-quarter of its whole distance into the bladebar. (See dashed linesin Fig. 4.) I sometimes have my blade hollowed, and dispense with theblade-bar H, AFig. 4, isV a `pin or short shaft fastened in theblade-barF, atA right angles to it, crossing the aperture, upon whichhangs,the blade-bar rod I, Figs. 3 Aand 4. This blade-bar rod isadjustable, being lengthened or shortened thus. It bears at its lowerend (seen in Fig. 4) a projection at right angles to it, in which is anaperture furnished with a female screw. Into this aperture passes a malescrew, J, Fig. 4, the other or left-hand end of which passes through anarm, K, called theb1adebarrod arm, which is borne on a pin, upon whichit turns. This pin `is placed, eccentrically, on the side of awheel orpulley, L, Figs. l, 2, 3, and 4, which wheel is furnished with cogs onone-half its periphery, as seenin Figs. 1 and 4, called theblade-bar-falling wheel. The screw J has, on each side of the arm Kwhich bears it, a nut, by which nuts it is held wherever desiredon thearm K. The bladebar-falling wheel (so called because it causes theblade-bar to descend) L is borne by appropriate bearings, in lwhich itsshafttsee Fig.

1) moves, attached to the side of the standard`r half its periphery. Icall these wheels, L and N, half cog-wheels? These two VKwheels L and Nare so keyed upon the shaft as that the portions respectively of themarmed with cogs Y are on opposite sides of the shaft which bears them,so that when one of the pair is rotated by the cog-wheels below, ashereinafter dcscribed, the other, presenting no cogs to be' geared with,is not operated on'. I now pass to that portion of the machine at whichmotion is communicated. At the left hand in Fig. 1 is seen a fly-wheel,P, to regulate the motion of the machine, keyed onto a shaft, Q, whichbears two clutch-pulleys, R and S, Figs. 1 and 3, moving freely on theshaft. The pulley S is worked with a cross-belt, (not seen in thedrawings,) and, receiving its motion from the same counter-shaft above,turns, therefore, in a different direction from the pulley It. T, Figs.1 and 3, is the clutch, worked by the clutch-lever U, Figs. 1 and 3.This clutch is borne by a projection from the side of the standard A,and is arranged in the usual manner, with a slotand a spline, upon theshaft Q. V, Figs. 1 and 3, is a cog-wheel borne by the shaft Q, androtating with it. It gears into another cog-wheel, W, Fig. 3, (the upperpart of which is also seen in Fig. 1,) borne by a shaft, Y, (seen indotted lines in Fig. 3,) passing beneath and across the platform U C atthe upper side of it in Fig. 3. At the righthand end or side in Fig. 1,but seen only in Fig. 3, the shaft Y bears a bevel-wheel, Z, Figs. 2 and3, which gears into another bevelwheel, B x, at right angles to it,borne (see Fig. 2) by the shaft D", which shaft is borne by appropriatebearings projecting from the side of the standard AX. This shaft Dxbears two cog-wheels, one, E X, exactly beneath the wheel L, and gearingwith it, and the other, F", cX- actly beneath the wheel N, and gearingwith it. The rotation of these wheels EX and FX thus rotates the wheelsabove them when the cogs with which the upper wheels are partially armedare down.

The operation of the invention is as follows: The blade-bar F beingsupposed to be at its highest elevation, a bundle of paper whose edgesare to be cut is placed upon the platform, with the portion to be cutoff protruding on the hither side, in Fig. l, of the line(perpendicularly) of the blade G. The belt on the clutch-pulley It, andthe cross-belt on the clutch-pulley S, being put in motion, the handleof the clutch-lever U is drawn to the right, when the ratchet-teeth ofthe clutch gear into the pulley It,',thus, by means of thesloty andspline of the clutch, rotating the shaft Q and the cog-wheel V. Thecog-wheel W and its shaft Y are thus rotated, carrying withthem thebevel-wheel Z, Fig. 3, with the bevel-wheel BX, thus rotating` the shaftDwit'hit's cogwheels EX and FX.Y *The blade-bar,- falling wheel L is sokeyed to its shaft as ythat when the blade-bar is 1 at its highestelevation the Vfirst cog of the seriesiof cogs which surround half itsperiphery comes into gear with the cog-wheel E", when the wheel L andits shaft ,perform a half of a complete rotation. The

cog-wheel F. being smaller than the wheel L, this half rotation iscomparatively slow. The blade-bar-rod arm K being thus rotated, theblade-bar rod I isdrawn to the right in Fig. 1, thus swinging theblade-bar and blade down till it reaches the platform; and at this timethe blade makes a drawing cut, and the func- ,tion of the machine isperformed. The cogs on the wheel L have, by this time, passed theirco-working cogs ofthe wheel Fix, which wheel now has no action'on thewheel L, but at this time the cogs of the blade-bar-lifting wheel N(this wheel being appropriately keyed on its shaft) come in contact withthe cogs of the wheel FX, (see Fig. 2,) when another semirotation of theshaft bearing the wheels N and L is performed, completing the rotationof the blade-bar-rod arm K, and pressing back the blade-bar rod I, thusswinging the blade-bar up away from the platform. The cog-wheel FX beinglarger in proportion to the wheel N than the cog-wheel E is inproportion to the wheel L, the motion of the wheel N is faster than whenthe cog-wheel E was drawing the blade down.

I thus economize time in the action of the machine, and do this withouthurrying the machine at the critical moment of its action.

It is often the case that, in cutting a bundle of paper, it will getdisarranged, when it is of great advantage to stop immediately thedescent of the blade, and cause it to rise again without having reachedthe platform. Todo this I simply move the handle of my clutchlever tothe left, when the clutch is moved from the clutch-pulley R and putingear with the clutch-pulley S, (with its'crossbelt,) when the blade, howvfar soever it may have descended, immediately rises.

When the machine is to be quiescent, the clutch is moved, by its lever,to a location midway of the two clutch-pulleys, and touches neither. Theblade-bar is seen to be suspended by the two blade-bar arms. I preferlthis feature as obviating the friction encountered by other methods ofholding the blade-bar, but I do not claim it. When the blade is wornaway by use it will not reach the platform, though the blade-bar hasdescended to its lowest elevation, and would thus leave the lower sheetsof the bundle uncut. I then unscrew the necessary distance the twoscrews in the arms Fx Fx, which are below, and screw in the two upperscrews, thus lowering the two boxes or bearings F Iiyand with them theblade-bar land blade.

I have another device for taking up the wear of the blade. When thisisnecessary, I simply screwlthe screw J, Fig1 4, up farther into theprojection of the blade-bar 'rod I, (adjusting and fastening it by meansof the nuts it bears on each side of the arm K,) thus "irtuallyshortening the rod' I, when the rotation of the Wheel L (as thepinbearing the arm K is carried to its farthest point from the bladebar)isenabled to bring the blade G fully'down upon the platform,notwithstanding the blade may have been narrowed by Wear.

'It has been stated that the knife-bar F is hollow for a certaindistance, having an aperture into which the blade-bar enters. By thisarrangement I bring the line of the tractive force exertednpon the rodI, as nearly as pos- THOMAS BROWN DooLEY.

Witnesses:

LEMUEL P. JENKs, GEORGEL. DYER.

